Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 7,530	$ 5,172
Accounts receivable, less allowance for doubtful accounts of $5,466 and $7,667, respectively	101,591	101,902
Accounts receivable - other	2,999	1,356
Inventories	98,572	89,766
Contract assets	41,151	39,231
Prepaid expenses and other current assets	13,805	11,030
Total current assets	265,648	248,457
Property, plant and equipment, net	45,070	36,644
Operating lease right-of-use assets	5,872	3,826
Intangible assets, net	60,476	58,746
Goodwill	38,618	36,116
Other assets	13,062	10,135
Total assets	428,746	393,924
Current liabilities:
Accounts payable	38,039	39,327
Other current liabilities	33,790	44,670
Current portion of long-term debt	15,286	15,286
Current portion of acquisition-related contingent liabilities	3,362	5,589
Total current liabilities	90,477	104,872
Long-term debt	98,205	72,372
Long-term pension liability	14,443	14,574
Long-term acquisition-related contingent liabilities	0	1,892
Long-term operating lease liabilities	1,952	1,599
Deferred tax liability	1,353	450
Other long-term liabilities	8,801	6,535
Commitments and contingencies (Note 6)
Shareholders’ equity:
Preferred stock, $.001 par value - authorized 300,000 shares (none issued)	0	0
Common stock, $.001 par value - authorized 50,000,000 shares, issued and outstanding 15,824,530 and 15,391,660 shares, respectively.	16	15
Additional paid-in capital	65,578	61,844
Retained earnings	153,412	141,972
Accumulated other comprehensive income (loss), net of tax:
Pensions	(4,563)	(10,898)
Cash flow hedges	58	69
Foreign currency translation adjustment	(986)	(1,372)
Total shareholders’ equity	213,515	191,630
Total liabilities and shareholders’ equity	$ 428,746	$ 393,924